Which of the following numbers is different from the others? A) 532 B) 734 C) 853 D) 751

Let's test divisibility by 7.

• For (A) 532:

  $$\frac{532}{7} = 76$$

  So, 532 is divisible by 7.

• For (B) 734:

  $$\frac{734}{7} = 104 \text{ with a remainder of } 6$$

  So, 734 is not divisible by 7.

• For (C) 853:

  $$\frac{853}{7} = 121 \text{ with a remainder of } 6$$

  So, 853 is not divisible by 7.

• For (D) 751:

  $$\frac{751}{7} = 107 \text{ with a remainder of } 2$$

  So, 751 is not divisible by 7.

Numbers (B), (C), and (D) are not divisible by 7. Number (A) is divisible by 7. Therefore, 532 is the odd one out.

The final answer is $\boxed{\text{A}}$.